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    Re: Gps Crash
    From: JC Sutherland
    Date: 1999 Aug 22, 3:27 PM

    Thanks for your question. My GPS is a 6 yr old Trimble Ensign.
    I have been carefully monitoring the position of my house all day today and 
    have had no glitches or problems of any sort. Even when I switched on this 
    morning it aquired satellites in 15 min which is a lot faster than when I 
    first bought it.
    A discussion group on all aspects of satnav I recommend subscribing to is the 
    RIN website at  .�
    Incidentally I use a Texas Ti-82 calculator, which has a graphics display, for 
    Sight Reduction. It has a good statistical proceedure built in. For example, 
    I can tabulate a series of repeated sights and then find the least squares 
    fit equation, using linear or quadratic regression,and display the derived� 
    plot on the screen together with the observed sights (so that I can� reject 
    any bad sights).
    I have written programs for converting these equations into an Intercept and 
    Azimuth for plotting a Position Line on a chart.
    I use the 5 year " Compact Data for Navigation and Astronomy� by HM Nautical 
    Almanac Office" for GHA and Dec etc data. It is cheaper than 5 copies of� the 
    1 year Nautical Almanac and takes up less space.However it takes a bit of 
    getting used to.
    If anyone is interested in these programs I be happy to copy them over. 
    However they are specific to the Ti-82,��
    Regards to everyone, Keep up the good work

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